from flask import Flask, current_app, make_response
from flask.json import dumps
# from json import dumps
from flask_restful import Resource, Api, fields, marshal_with, marshal

app = Flask(__name__)

api = Api(app)

@api.representation("application/json")
def output_json(data, code, headers=None):
    """Makes a Flask response with a JSON encoded body"""

    # 此处添加自己定义的json格式规则
    if "message" not in data:
        data = {
            # "message": "OK",
            'code': 200,
            "data": data
        }

    settings = current_app.config.get('RESTFUL_JSON', {})

    # If we're in debug mode, and the indent is not set, we set it to a
    # reasonable value here.  Note that this won't override any existing value
    # that was set.  We also set the "sort_keys" value.
    if current_app.debug:
        settings.setdefault('indent', 4)
        # settings.setdefault('sort_keys', not PY3)
        settings.setdefault('sort_keys',)

    # always end the json dumps with a new line
    # see https://github.com/mitsuhiko/flask/pull/1262
    dumped = dumps(data, **settings) + "\n"

    resp = make_response(dumped, code)
    resp.headers.extend(headers or {})
    return resp
